57671701 divided by 639 
The aim is to understand the frequency of 639 in 57671701.

Going ahead to step 1:
5 divided by 639 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 639

Going ahead to step 2:
If we divide 57 by 639, we get 0 and a remainder of 57.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Take the next digit (6) from the dividend and append it to 57, then repeat: 576 / 639

Advancing to step 3:
639 goes into 576 0 times with a remainder of 576.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 576 leaves us with 576.
Bring next digit (7) of the dividend behind the 576 and repeat the process: 5767 / 639

Step 4:
If we divide 5767 by 639, we get 9 and a remainder of 16.
The next digit of our result is 9. 
Result so far: 9.0
If we take 5751 away from 5767, we end up with 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 639

On to step 5:
639 goes into 161 0 times with a remainder of 161.
Put 0 as the next digit of the answer. 
Result so far: 90.0
The remainder is 161 after subtracting 0 from 161.
Fetch the next digit (7) from the dividend, attach it to 161 and continue: 1617 / 639

On to step 6:
If we divide 1617 by 639, we get 2 and a remainder of 339.
Record the quotient 2 as the next digit in the result. 
Result so far: 902.0
Deduct 1278 from 1617 and we're left with 339.
Grab the next digit (0) from the dividend, add it to 339, then carry on: 3390 / 639

Step 7:
639 goes into 3390 5 times with a remainder of 195.
The number 5 becomes the next digit in our result. 
Result so far: 9025.0
Deduct 3195 from 3390 and we're left with 195.
Include the next digit (1) from the dividend after 195, then repeat: 1951 / 639

On to step 8:
If we divide 1951 by 639, we get 3 and a remainder of 34.
The next digit of our result is 3. 
Result so far: 90253.0
If we take 1917 away from 1951, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 9:
If we divide 340 by 639, we get 0 and a remainder of 340.
The number 0 becomes the next digit in our result. 
Result so far: 90253.0
Deduct 0 from 340 and we're left with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 10:
639 goes into 3400 5 times with a remainder of 205.
Write down 5 as next digit of the result. 
Result so far: 90253.05
If we take 3195 away from 3400, we end up with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 11:
When dividing 2050 by 639, we get 3 with a remainder of 133.
The next digit of our result is 3. 
Result so far: 90253.053
Deduct 1917 from 2050 and we're left with 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Moving on to step 12:
If we divide 1330 by 639, we get 2 and a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 90253.0532
The remainder is 52 after subtracting 1278 from 1330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 13:
When dividing 520 by 639, we get 0 with a remainder of 520.
Use 0 as the next digit of our solution. 
Result so far: 90253.0532
Subtract 0 from 520 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 14:
The number 639 fits into 5200 8 times, leaving a remainder of 88.
Use 8 as the next digit of our solution. 
Result so far: 90253.053208
Subtract 5112 from 5200 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 15:
When dividing 880 by 639, we get 1 with a remainder of 241.
Record the quotient 1 as the next digit in the result. 
Result so far: 90253.0532081
If we subtract 639 from 880, we get 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Let's proceed to step 16:
The number 639 fits into 2410 3 times, leaving a remainder of 493.
The number 3 becomes the next digit in our result. 
Result so far: 90253.05320813
If we take 1917 away from 2410, we end up with 493.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4930, and continue the process.

The final outcome is 90253.05320813, with a leftover of 4.93e-07.